Machine ob sceeen foe



UNITED sTATEs PATENT oEEicE.

ELISHA D. PAYNE AND ENOS WOODRUEF, OF NEVARK, NEW JERSEY. i

MACHINE OR SCREEN FOR SIFTING COAL, GRAIN, &c.

T all whom t may concern.'

Be it known that we, ELIsHA D. PAYNE and ENOS WOODRUFF, of Newark, inthe county of Essex and State of New Jersey, have invented a new anduseful machine for the purpose of sifting all materials that are to besifted, which plan may be used in the construction of common screens,whether single, double, or multiplied,a single screen being used toseparate any material to be sifted into two parts, a double screen intothree parts, and a multiplied screen into y four or more parts.

7e propose to make screens for grain, flour, meal, coal, sand, &c., onour plan.

Our improvement consists in a new method of hanging the sifting box bymeans of two gudgeons or by a single rod or axle, and providing a guideboard in the sifting box to guide the material to be sifted on to thehead of the screen. We give to the screen a peculiar shape which formsthe under part of the sifting box and incline it from its head to itsdelivery end to suit the nature of the material sifted. The axle orgudgeons we place about one third of the way from the head of thesifting box to the tail or delivery end, and we agitate the sifting boxby raising or depressing the one end by means of a cam-toothed wheelwith a spring at the other end to return the motion against the toothwheel so that it is vibrated vertically like a tilt hammer.

We do hereby declare that the following is a full and exact descriptionof. the'construction and operation of our improvement, reference beinghad to the annexed drawings making a part of this specification.

Figure l is a plan. Fig. 2 is a section.

We first make a box or frame to hang the sifter box in which is seen ata, a. vWe next make a sifter box seen at Z9, which we provide with aguide board seen at c', which with the head board of the sifter box andthe head end of the screen seen at g, g, forms the throat way of thesifter box seen at la. At f, is seenthe course of the sifted materialthrough the throatway and along the upper surface of the screen or sieveto where it passes oif at the delivery end of the screen. See the dottedline. The gudgeons or axle by which the sifter box is hung in the frameare seen at e, and placed about one third of the distance from the headend of the screen to the tail end of it. At Z, is seen the crank andshaft and at c, is seen the cam-toothed wheel attached to the shaft. Theshaft is attached to the frame or case a, a, by means of caps. Thiscam-toothed wheel may be either made to work on the upper or under edgeot' thesifting box and at either end of it. Ve commonly make it work onthe upper edge of the head end of the sifting box and place the springseen at ci, on the other end to react against the tooth wheel andagainst the beater bar seen at 7c, n.

the bar being attached to the frame a, a, under the delivery end of thesifting box for the delivery end of the sifter box to rock on. y

It is obvious that from the different qualities and nature of thevarious materials that require to be sifted that different machines haveto be variously modified to suit eachv kind; still our plan of formingthe sifting box and of hanging and agitating it may be applied for allpurposes of sifting or screening. `We in some cases make a screen`coarse at the head line in the middle and finer at the tail end toseparate the sifted material into a number of qualities. InV

Operation: The material to be sifted being put into the sifting box, byturning the crank in the right direction to press the convex sides ofthe cam-toothed wheel on the edge of the sifter box, the sifter box ismade to vibrate vertically like a trip hammer.

The spring reacting against the teeth of the wheel and the beater barproduces an effective operation. The coarser part of the material beingscreened glides off at the delivery end ofthe sifting box, the finerdropping through `the sieve into the .box provided to receiveitunderneath.

What we claim and for which we ask Letters Patentiel. Combining theinclined guide board with a box or case for receiving the material to besifted, constructed as described, said box consisting of side and endpieces and an inclined bottom pierced with apertures for sifting thecoal or other materials, the whole being arranged as herein set forth.

2. Also in combination with the sifting the `Whole being constructed andoperating box thus4 constructed, an exterior case for in the mannerheroin set onth.

containing the same. ELISHA D. PAYNE. [LL 5.]

` 3.Last1y in combination with the sfter ENOS VOODRUFF. [n SQ] 5 box and`external case `the "method of 5115-" WVtmessesf pending and operating`the shoe by means ol GABmEL T. FREEMAN,`

the axle e, the spring 1l, `and `the Whoe'lo7 ELIAS FEEMAN.

